61560036789 has 4 divisors (see below), whose sum is σ = 82080049056. Its totient is φ = 41040024524.

The previous prime is 61560036757. The next prime is 61560036817. The reversal of 61560036789 is 98763006516.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61560036789 - 2⁵ = 61560036757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61560036739) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10260006129 + ... + 10260006134.

It is an arithmetic number, because the mean of its divisors is an integer number (20520012264).

Almost surely, 2^61560036789 is an apocalyptic number.

It is an amenable number.

61560036789 is a deficient number, since it is larger than the sum of its proper divisors (20520012267).

61560036789 is a wasteful number, since it uses less digits than its factorization.

61560036789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20520012266.

The product of its (nonzero) digits is 1632960, while the sum is 51.

The spelling of 61560036789 in words is "sixty-one billion, five hundred sixty million, thirty-six thousand, seven hundred eighty-nine".